针对金刚石滚轮是一种回转体零件以及其加工制造过程中信息化集成程度低等特点,对金刚石滚轮的特征信息提取、特征加工方案决策、数控程序后置处理等关键技术进行了研究,采用了产品模型数据交换标准STEP AP 242,实现对金刚石滚轮的制造...针对金刚石滚轮是一种回转体零件以及其加工制造过程中信息化集成程度低等特点,对金刚石滚轮的特征信息提取、特征加工方案决策、数控程序后置处理等关键技术进行了研究,采用了产品模型数据交换标准STEP AP 242,实现对金刚石滚轮的制造特征信息提取,使用STEP AP 242和PDM相结合的集成方式,将金刚石滚轮三维模型作为制造加工信息的载体,并选择SolidWorks作为CAD和CAM软件,以及选择Aras Innovator作为PDM平台,使用C#编程语言和数据库技术开发了金刚石滚轮CAD/CAPP/CAM/PDM集成系统,并进行了实例验证。展开更多
目的探究以护士为基础,麻醉医师与专科医生指导的急性疼痛服务模式(NBASS-APS)在老年颅脑损伤(TBI)患者围术期疼痛管理中的应用效果,为治疗该病症提供方法。方法纳入2019年3月—2024年3月在山西省汾阳医院治疗的老年TBI患者80例,所有患...目的探究以护士为基础,麻醉医师与专科医生指导的急性疼痛服务模式(NBASS-APS)在老年颅脑损伤(TBI)患者围术期疼痛管理中的应用效果,为治疗该病症提供方法。方法纳入2019年3月—2024年3月在山西省汾阳医院治疗的老年TBI患者80例,所有患者按照随机数表法分为观察组(n=40)和对照组(n=40)。2组在相同治疗的基础上,对照组行常规围术期护理,观察组行NBASS-APS模式下疼痛管理干预。对比2组术后不同时间疼痛程度[采用重症监护疼痛观察工具(CPOT)评估]、神经功能[采用格拉斯哥昏迷评分法(GCS)评估]、术后恢复进程(术后疼痛缓解时间、ICU治疗时间、住院时间),以及护理满意度。结果2组术后7 d CPOT评分达到最低值,且观察组CPOT评分低于对照组(均P<0.05);2组术后3 d、7 d GCS评分升高,观察组GCS评分高于对照组(均P<0.05);观察组术后疼痛缓解时间、ICU治疗时间、住院时间均少于对照组(均P<0.05);观察组护理满意度高于对照组(92.50%vs 67.50%,P<0.05)。结论老年TBI患者接受NBASS-APS模式,可有效缓解老年TBI患者的术后疼痛,改善神经功能,促进术后恢复,并且患者护理满意度较高,具有一定的临床应用价值。展开更多
This paper deals with the proposal of a new model based on Agent Petri Nets (APN) to specify interactions among agents in Multi Agents System (MAS). Indeed, an agent approach requires a powerful and expressive formali...This paper deals with the proposal of a new model based on Agent Petri Nets (APN) to specify interactions among agents in Multi Agents System (MAS). Indeed, an agent approach requires a powerful and expressive formalism that allows him to model the behavior of a set of agents that interact. We are modeling some variants of FIPA standard protocols. Our Models are found based on communicating cognitive agents. Each Agent is capable of perceiving their environment partly and building, sending and receiving messages.展开更多
Fixture design and planning is one of the most important manufacturing activities, playing a pivotal role in deciding the lead time for product development. Fixture design, which affects the part-quality in terms of g...Fixture design and planning is one of the most important manufacturing activities, playing a pivotal role in deciding the lead time for product development. Fixture design, which affects the part-quality in terms of geometric accuracy and surface finish, can be enhanced by using the product manufacturing information(PMI) stored in the neutral standard for the exchange of product model data(STEP) file, thereby integrating design and manufacturing. The present paper proposes a unique fixture design approach, to extract the geometry information from STEP application protocol(AP) 242 files of computer aided design(CAD) models, for providing automatic suggestions of locator positions and clamping surfaces. Automatic feature extraction software "FiXplan", developed using the programming language C#, is used to extract the part feature, dimension and geometry information. The information from the STEP AP 242 file is deduced using geometric reasoning techniques, which in turn is utilized for fixture planning. The developed software is observed to be adept in identifying the primary, secondary, and tertiary locating faces and locator position configurations of prismatic components. Structural analysis of the prismatic part under different locator positions was performed using commercial finite element method software, ABAQUS, and the optimized locator position was identified on the basis of minimum deformation of the workpiece.The area-ratio(base locator enclosed area(%)/work piece base area(%)) for the ideal locator configuration was observed as 33%. Experiments were conducted on a prismatic workpiece using a specially designed fixture, for different locator configurations. The surface roughness and waviness of the machined surfaces were analysed using an Alicona non-contact optical profilometer. The best surface characteristics were obtained for the surface machined under the ideal locator positions having an area-ratio of 33%, thus validating the predicted numerical results. The efficiency, capability and applicability of the developed software is demonstrated for the finishing operation of a sensor cover – a typical prismatic component having applications in the naval industry, under different locator configurations.The best results were obtained under the proposed ideal locator configuration of area-ratio 33%.展开更多
文摘针对金刚石滚轮是一种回转体零件以及其加工制造过程中信息化集成程度低等特点,对金刚石滚轮的特征信息提取、特征加工方案决策、数控程序后置处理等关键技术进行了研究,采用了产品模型数据交换标准STEP AP 242,实现对金刚石滚轮的制造特征信息提取,使用STEP AP 242和PDM相结合的集成方式,将金刚石滚轮三维模型作为制造加工信息的载体,并选择SolidWorks作为CAD和CAM软件,以及选择Aras Innovator作为PDM平台,使用C#编程语言和数据库技术开发了金刚石滚轮CAD/CAPP/CAM/PDM集成系统,并进行了实例验证。
文摘目的探究以护士为基础,麻醉医师与专科医生指导的急性疼痛服务模式(NBASS-APS)在老年颅脑损伤(TBI)患者围术期疼痛管理中的应用效果,为治疗该病症提供方法。方法纳入2019年3月—2024年3月在山西省汾阳医院治疗的老年TBI患者80例,所有患者按照随机数表法分为观察组(n=40)和对照组(n=40)。2组在相同治疗的基础上,对照组行常规围术期护理,观察组行NBASS-APS模式下疼痛管理干预。对比2组术后不同时间疼痛程度[采用重症监护疼痛观察工具(CPOT)评估]、神经功能[采用格拉斯哥昏迷评分法(GCS)评估]、术后恢复进程(术后疼痛缓解时间、ICU治疗时间、住院时间),以及护理满意度。结果2组术后7 d CPOT评分达到最低值,且观察组CPOT评分低于对照组(均P<0.05);2组术后3 d、7 d GCS评分升高,观察组GCS评分高于对照组(均P<0.05);观察组术后疼痛缓解时间、ICU治疗时间、住院时间均少于对照组(均P<0.05);观察组护理满意度高于对照组(92.50%vs 67.50%,P<0.05)。结论老年TBI患者接受NBASS-APS模式,可有效缓解老年TBI患者的术后疼痛,改善神经功能,促进术后恢复,并且患者护理满意度较高,具有一定的临床应用价值。
文摘This paper deals with the proposal of a new model based on Agent Petri Nets (APN) to specify interactions among agents in Multi Agents System (MAS). Indeed, an agent approach requires a powerful and expressive formalism that allows him to model the behavior of a set of agents that interact. We are modeling some variants of FIPA standard protocols. Our Models are found based on communicating cognitive agents. Each Agent is capable of perceiving their environment partly and building, sending and receiving messages.
基金Department of Science and Technology,Government of India for providing financial support under the scheme FIST(No.SR/FST/ETI-388/2015)。
文摘Fixture design and planning is one of the most important manufacturing activities, playing a pivotal role in deciding the lead time for product development. Fixture design, which affects the part-quality in terms of geometric accuracy and surface finish, can be enhanced by using the product manufacturing information(PMI) stored in the neutral standard for the exchange of product model data(STEP) file, thereby integrating design and manufacturing. The present paper proposes a unique fixture design approach, to extract the geometry information from STEP application protocol(AP) 242 files of computer aided design(CAD) models, for providing automatic suggestions of locator positions and clamping surfaces. Automatic feature extraction software "FiXplan", developed using the programming language C#, is used to extract the part feature, dimension and geometry information. The information from the STEP AP 242 file is deduced using geometric reasoning techniques, which in turn is utilized for fixture planning. The developed software is observed to be adept in identifying the primary, secondary, and tertiary locating faces and locator position configurations of prismatic components. Structural analysis of the prismatic part under different locator positions was performed using commercial finite element method software, ABAQUS, and the optimized locator position was identified on the basis of minimum deformation of the workpiece.The area-ratio(base locator enclosed area(%)/work piece base area(%)) for the ideal locator configuration was observed as 33%. Experiments were conducted on a prismatic workpiece using a specially designed fixture, for different locator configurations. The surface roughness and waviness of the machined surfaces were analysed using an Alicona non-contact optical profilometer. The best surface characteristics were obtained for the surface machined under the ideal locator positions having an area-ratio of 33%, thus validating the predicted numerical results. The efficiency, capability and applicability of the developed software is demonstrated for the finishing operation of a sensor cover – a typical prismatic component having applications in the naval industry, under different locator configurations.The best results were obtained under the proposed ideal locator configuration of area-ratio 33%.
